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Cervélo unveiled its long awaited P4 time trial/triathlon frame to much fanfare during the first indoor day of this year’s Interbike trade show. As the successor to the highly popular (and competitively successful) P3C, Cervélo understandably set out to create something that was not only more aerodynamic but also better - or at least comparable – in terms of overall rigidity, drivetrain efficiency, weight and rider comfort.

Cervélo took a much more integrated approach to the P4 than the P3C which was essentially an aero frame with a bunch of other parts bolted on. The fork is now a custom Cervélo design that blends in well with the head tube and dropped down tube, thus forming a more continuous surface for less interrupted airflow. Spacing between the tyre and crown and legs has supposedly also been optimised in the wind tunnel.

Further up the head tube, custom aero-profiled headset spacers mesh perfectly with the 3T Ventus bar that was on the display bike and as on the recently launched S3 road frame, the internally routed housings for the rear brake and derailleurs enter into the top of the top tube behind the stem. The result is an ultra-clean front end that, at least on inspection, should provide a clean leading edge to the wind.

Just above the bottom bracket is perhaps one of the most interesting aspects of the new P4: an integrated water bottle. When snapped into its proprietary built-in holder, the bottle not only offers 570ml of fluid but also cleans up the aerodynamics in the area by virtue of the newly continuous surface area. In fact, Cervélo claims the P4 is faster with the bottle attached than without.

A handy flip-top lid allows on-the-go refilling, too, and an optional utility box will take the bottle’s place for those who want a place to stash inflator cartridges, tools and the like. Another alternative will be a 'structural stiffener'.

The P4’s rear brake is mounted aft of the bottom bracket but instead of placing it either above or below the chain stays, Cervélo houses a proprietary integrated unit directly inside the frame. The tiny cantilever brake comprises over a dozen individual pieces yet is claimed to be 30 percent lighter than a Dura-Ace calliper. More importantly, Cervélo also claims the integrated rear brake provides comparable power and modulation when coupled with the structural carbon booster plate which, conveniently, also acts as the outer cover. The cover is easily removable when brake adjustments are needed.

Even without these integrated touches, the P4 frame shape is more slippery than its forebear. The bigger asymmetrical chain stays are more rigid than before and also more aerodynamic, especially in crosswinds. The slender aero-shaped seat stays now join the deeply scalloped seat tube further down than before, too, in order to present less frontal area. Naturally, all of the rest of the tubes use aero profiles.

Though official weights weren't available at the time of introduction, we anticipate the new P4 to be no more than the P3C’s roughly 1300g for a bare 54cm sample. Framesets will begin shipping around December of this year and will fetch US$4,800; complete bikes with SRAM Red will arrive shortly thereafter for US$6,800.

Here's a video of the Cervelo being unveiled:

Storck flies the ‘lighter, stiffer and more comfortable’ flag for Germany

German frame builders are renowned for their ability to create exceptionally light frames that are also fantastically stiff and Storck’s top-end Fascenario line has been widely heralded by a number of third-party objective testers as being among the lightest and stiffest out there.

According to company founder Marcus Storck, a big part of the secret is his new VVC (Vacuum Void Control) manufacturing process. Rather than just use internally applied pressure to distribute resin and compact the tube walls from the inside out during the molding process, Storck also adds an autoclave to suck the resin through the fibres.

While the technology is impressive, it’s also expensive: the Fascenario 0.7 frameset alone is over US$6,000. Storck aims to bring its technology a little more down to earth with the Fenomalist, though, which is a relative bargain at US$3,800 for the frame, fork and headset. Complete bikes with Dura-Ace 7900, Mavic Ksyrium SL Premium wheels and an array of Syntace components will go for US$7,999.

The Fenomalist trades in the Fascenario’s VCC process for more conventional bladder-molded construction and claimed frame weight jumps to 991g as a result; the included carbon fork adds another 400g. While almost 300g heavier than the Fascenario, the Fenomalist is still no heavyweight and stiffness figures are apparently even better in some instances.

How is it on the road? We don't know yet but will find out soon: our test bike is slated to arrive sometime in October. Check back in a few weeks.

James started as a roadie in 1990 with his high school team but switched to dirt in 1994 and has enjoyed both ever since. Anything that comes through his hands is bound to be taken apart, and those hands still sometimes smell like fork oil even though he retired from shop life in 2007. He prefers manual over automatic, fizzy over still, and the right way over the easy way.

Discipline: Mountain, road, cyclocross

Preferred Terrain: Up in the Colorado high-country where the singletrack is still single, the dirt is still brown, and the aspens are in full bloom. Also, those perfect stretches of pavement where the road snakes across the mountainside like an artist's paintbrush.